OCTO Spectrum - Softcover

Gardner, Doug

 
9781449995706: OCTO Spectrum

Inhaltsangabe

The OCTO puzzle is a patented math and logic challenge that is part Sudoku, part Kakuro, and part something else entirely! OCTO Spectrum is a collection of 60 OCTO puzzles that range from Easy to Very Hard--the perfect book for puzzle fans who want to experience the full spectrum of challenge available from the OCTO puzzle.

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